#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define MAXLINE 1000

int getline(char *s, int lim)
{
    int i = 0;

    while(i < lim - 1 && (*s = getchar()) != EOF && *s++ != '\n')
       i++;

    if(*s == '\n')
      *s++ = '\n', i++;

    *s = '\0';
    return i;
}
int main(int argc, char *argv[])
{   

     char line[MAXLINE];
     long lineno = 0;
     int c, except = 0, number = 0, found = 0;

     while(--argc > 0 && (*++argv)[0] == '-')
        while(c = *++argv[0])
          switch(c) {
             case 'x':
                  except = 1;
                  break;
             case 'n':
                  number = 1;
                  break;
             default:
                  printf("find: illegal option %c\n", c);
                  argc = 0;
                  found = -1;
                  break;
          }

     if(argc != 1)
         printf("Usage: find -x -n pattern\n");
     else
         while(getline(line, MAXLINE) > 0) {
             lineno++;
             if((strstr(line, *argv) != NULL) != except) {
                   if(number)
                      printf("%ld:", lineno);
                   printf("%s", line);
                   found++;
             }
         }

     printf("Found: %d", found);
     return found;
}

